Page 1 The California ""- Geographer Annual Publication of the ...

More documents

Recommendations

Info

COASTAL GEOGRAPHICAL FEATURES OF LAGUNA GUERRERO NEGRO RoBERT L. EBERHARDT Lockheed-California Company Lagoons on the lower western coast of Peninsula de Baja California, Mexico, between 24 to 30 degrees North are allied both geologically and biologically to those found further north in the States of Baja California, Mexico, and California, United States of America. The largest lagoon complex is the Bahia Magdalena series centered on 25 degrees North. Another large lagoon area is that one encompassing Laguna Ojo de Liebre (Scammon Lagoon) at 28 degrees latitude. The Laguna Ojo de Liebre complex is on the depressed edge of an extremely Bat alluvial plain lying between the Sierra de San Borjas of the Peninsular Range to the northeast and the Sierra Vizcaino de San Andreas, a range to the southwest that toes off into the Paci£c Ocean at Punta Eugenio. Laguna Guerrero Negro lies near the center of this 200-odd square mile complex composed from north to south of three lagoons. They are Lagunna Manuela (6 square miles), Laguna Guerrero Negro (41 square miles), and Laguna Ojo de Liebre (156 square miles). Each of these opens to the sea by its own separate mouth and a bar is deposited across each entrance. Narrow land bridges separate the three lagoons, each of which is surrounded by extensive tidal Bats. The central axis of pear-shaped Laguna Guerrero Negro dips to the northwest (Figure 1). The north-south length is eight miles and the eastwest width is approximately £ve miles. Wide-shelved and precipitouslywalled meanders drain the lagoon. Typically, the deepest channels are immediately at the head of the entrance channel behind the lagoon barrier, which is a large sand island covered by scalloped barchans. There at the entrance depths are from 35 to 40 feet whereas the drainage laterals are 25 to 30 feet deep. Barchans also lie on the northern and northwesterly shores of the lagoon. In places the lee slopes impinge directly on the channel, and at these points the channel sides slant as much as40 degrees. SALT PROCESSING The combination of these natural features is such that the lagoon is an excellent site for large-scale salt processing operations. Puerto Venustiano Carranza lies within Laguna Guerrero Negro at 28°02. l'N, 114° 08.0' W and was established in 1957 as a company-operated port by Exportadora de Sal, S.A., to handle its salt trade.1 Deep-draft freighters are accommodated at this port, which is located approximately 325 nautical miles southeast of San Diego, California, and 60 miles due east of Isla ·cedros in Bahia Sebastian Vizcaino. 1 U.S. Hydrographic Office, Sailing Directions for the vVest Coast of 1\llexico, 1951, 9th ed., pp. 8-1 1, 41-42. 29
Figure T. Geographical and cultural features of laguna Guerrero Negro, Baja California del Sur, Mexico in 1962-64. 30
Page 1 and 2: The California ""- Geographer ' Ann
Page 4 and 5: A Modified Koppen Classification of
Page 6 and 7: This is not to say that the Koppen
Page 8 and 9: Mean Monthly and Seasonal Precipita
Page 10 and 11: It was also discovered that the bou
Page 12 and 13: Mean Monthly Temperatures (in F. o)
Page 14 and 15: Except for the various changes ment
Page 16 and 17: BIBLIOGRAPHY Ackerman, E.A., "The K
Page 18 and 19: PLANNING GEOGRAPHY IN THE CURRICULU
Page 20 and 21: angements of features which when in
Page 22: propriate name for these "fortran f
Page 25 and 26: The most numerous concerns are thos
Page 27 and 28: island of Makatea, long had the mon
Page 29 and 30: Cocorape in Paea, 19 kilometers sou
Page 31 and 32: vanilla and coconUt products accoun
Page 36 and 37: Although common salt is among the l
Page 38 and 39: Rainfall is slight. In 1938 and aga
Page 40 and 41: A 50-mile road net surrounding the
Page 42 and 43: TWO KEYS FOR THE HISTORICAL INTERPR
Page 44 and 45: proto-types are discussed here. It
Page 46 and 47: Although not nearly as extensive in
Page 48 and 49: KEY 2: A DICHOTOMOUS ELIMINATION KE
Page 50 and 51: not bflen practiced. The ard, suppo
Page 52 and 53: THE l\IIEXICALI VALLEY \VATER PROBL
Page 54 and 55: a part ot 1Vlex1co s LJowrado water
Page 56: and v�rious combinations of these
Page 59 and 60: in Spain" or the image of the Ameri
Page 61 and 62: Baldridge, Kenneth, A History of th
Page 63 and 64: Bryant, Edwin, What I Saw in Califo
Page 65 and 66: Coy, Owen C., In the Diggings in 'F
Page 67 and 68: Dyke, Dorothy, Transportation in th
Page 69 and 70: Goodwin, Cardinal L., The Establish
Page 71 and 72: Hellman, Margery S., "Port Costa, C
Page 73 and 74: Johnson, William G., Overland to Ca
Page 75 and 76: Lewis, Ruth R., "Kaweah : An Experi
Page 77 and 78: 1846-1875, unpublished master's the
Page 79 and 80: Potter, David M. (editor), Tmil to
Page 81 and 82: Ryan, William Redmond, Personal Adv
Page 83 and 84:
Thompson, John, "The Settlement Geo
Page 85 and 86:
Wheeler, May, John A. Sutter, A Cal
Page 87:
ExEcuTIVE BoARD Officers and Member
show all

Page 1 The California ""- Geographer Annual Publication of the ...

Create successful ePaper yourself

Delete template?

Save as template?